Bracelin said when deputies arrived at the large party, many people ran away from the scene. Bracelin said that a dive team was called out to check a pond near where the party was held and was there for more than 9 hours on two days, but has found nothing.

Dive teams will expand their search Thursday, and deputies and detectives will be searching the area on ATVs and on foot, according to Sgt. Brandon Bracelin, spokesman for the Polk County Sheriff's Office.

Sam is described a black male, 6 feet tall, and 200 pounds with blonde/brown dreadlocks. He was last seen wearing a black Nike sweatshirt with a white Nike logo, dark blue jeans and blue shoes.

Anyone with information should call the Polk County Sheriff’s Office at 515-286-3333.